I'm just getting started with Bachmann Trains. I have questions about the power pack. I have a power pack that is rated for 1 amp. I don't seem to have enough power that goes around to my entire layout. I don't have a lot of experience with the power pack usage with a basic Bachmann power pack.

My questions are the following:
How do I raise the amperage to about 3 amps with my current set of a power pack that is rated 1 amp.
Can I use an old power pack from a Tyco train set to run the switches on my Bachmann layout?
What I can I purchase to raise the amperage to 3 amps? Is there something that Bachmann sells?
Can a person add or should a person add Track feeders to bigger layout to get the power around the entire layout?
If I can, how do I do it?
Thank for assistance.